Drive-belt for variable-speed gearing.



Patented Dec. l0, I901. G. F. BONNER. DRIVE B'ELT'FDB VARIABLE SPEEDGEABING.

(Application filed Mar. 11, 1901.)

(N0 ModblJ' I Gea /@6200)? 611-.

witnagoea dilozucqo GEORGE F. GONNER, OF PORT HURON, MICHIGAN.

DRIVE-BELT FOR VARIABLE-SPEED GEARING.

SPZEOIEJIGATIOA? forming part of Letters Patent No. 688,718, datedDecember 10, 1901.

Application filed March 11, 1901. Serial No. 50,692. (No model.)

To all whom, it may concern.-

Be it known that I, GEORGE F. CONNER, a citizen of the United States,residing at Port Huron, in the county of St. Olairand State'of Michigan,have invented certain new and usefulImprovements in Drive-Belts forVariable- Speed Gearing; and I do declare the following to be a full,clear, and exact description of the invention, such as Will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to the construction of driving-belts forVariable-speed gearing of that type employing cone-pulleys; and it hasfor its object to increase the efficiency and (inrability of such beltsand to provide a belt having maximum strength and driving power.

To this end the invention consists in a drivebelt embodying certainnovel features of construction and combination of parts, as will behereinafter more fully described, and particularly pointed out in theappended claims. In the accompanying drawings, Figure 1 is a top planView showing the application of the belt to a pair of cone-pulleys. Fig.2 isa side elevation of the same. Fig. 3 is a detail plan view of aportion of the belt on an enlarged scale, and Fig. 4 is across-sectional view through the belt and a cone-pulley.

Referring now more particularly to the drawings, the numeral 1represents a drive-.

shaft, and the numeral 2 a driven shaft provided with cone-pulleys 3 and4, each composed of a pair of disks having conical drivingsurfacesarranged to face each other. One disk of each pair of disks is keyed orotherwise fixed to its shaft, while the other disk is mounted to slidethereon and is adapted to be moved toward and from said fixed disk. Ifdesired, however, the cone-disks of each pulley may both be mounted toslide upon the shaft, and in practice suitable mechanism, not necessaryto be herein shown, is employed to move the disks of one pair towardeach other and to simultaneously move the disks of the other pair awayfrom each other to control or regulate the relative speeds of rotationof the two shafts by simultaneously increasing the belt-running surfaceof the pulley upon one shaft and decreasing such surface of the pulleyon the other shaft in the usual manner. The form of shifting mechanismemployed for this purpose is immaterial; but I prefer that shown in myapplication. for patent for reversible variable-speed gearing filed ofeven date herewith and designated by Serial No. 50,691. The drive-belt 5connects the pulleys 3 and 4, and in accordance with my invention iscomposed of a link chain 6, formed of jointed link members 7, each ofwhich is provided with flattened angular side bearing-faces 8. To thischain is secured a belt or band 9, of leather or other fabric, whichbelt is arranged upon the under side of the chain, so as to form thedriving-surface, and is fastened to the chain in any approved manner,but preferably by providing the links of the chain with integralprojections 10, which extend through openings formed in the belt and arebent or clenched down against the under surface of the belt to firmlysecure the same to the chain. The belt or band 9 is made somewhat widerthan the chain, so that the longitudinal side edges ll thereof areadapted to fold out under pressure at an angle to the body of the beltand against the flattened angular side bearingfaces 8 of the chain-linksto form angular side bearing-surfaces which contact with the conicaldriving-surfaces of the pulley-sections.

As shown in Fig. 4, when the cone-disk sections of the pulleys are movedtoward and from each other a varying pressure is set up against the saidside edges 11 of the belt or band 9, which are thereby caused to foldoutwardly at an angle against the angular side faces 8 of thechain-links at a greater or less angle to the body of the belt,according to the amount of pressure exerted thereon by said disks, andthe pressure increases proportionately as the disks are moved towardeach other. From this it will be clearly understood that a closefrictional contact between the side edges 11 of the belt, which constitutes the driving surface thereof, and the conical driving-surface ofthe pulley-disks will be maintained at all times, but that the pressurewill be varied according to the position of said disks relatively toeach other, so that the driving power of the belt is increased ordiminished,accordingly as the pulley-disks are adjusted for high or lowspeed. By pro= viding a drive-belt consisting of a link chain securedupon the exterior surface of aband or belt of pliable material thestrength and durability of the latter are not only increased to agreatextent, but the edges of the belt in folding outwardly against arigid angular surface are adapted to maintain a much closer frictionalengagement with the cone drivingfaces of the pulley-disks than couldotherwise be secured, whereby maximum driving power is afforded. Theside edges of the belt, it will be clearly seen, constitute frictionaldriving-surfaces of pliable material having a rigid metallic backingformed by the angular flattened side faces 8 of the link members 7 ofthe chain.

From the foregoing description, taken in connection with theaccompanying drawings, the construction, mode of operation, andadvantages of the invention willbe readily understood without a furtherextended description.

Changes in the form, proportion, and minor details of construction maybe made within the scope of the invention without departing from thespirit or sacrificing any of the advantages thereof.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. A drive-belt consisting of a link chain having inclined side faces,and laterally-projecting flexible driving members adapted to foldagainst said inclined faces, substantially as described.

2. A drive-belt consisting of a link chain, the links of which areformed with side bearing-faces and faced with a continuous base ofpliable material, said base having longitudinal free edges projectinglaterally a short distance beyond the chain and forming yieldingfrictional drive-surfaces adapted to fold against said sidebearing-faces, substantially as described. u

3. A driving-belt consisting of jointed metallic links and a band of apliable material secured thereto and of a width greater than the links,said links having angular side faces against which the edges of thebandare adapted to fold, substantially as described.

4;. A driving-belt consisting of jointed metallic links and a band of apliable material secured thereto and ot" a width greater than the links,said links being formed with angular side faces against which the freeedges of the band are adapted to fold, and having integral studs passedthrough the band and clenched, whereby the band and links are united,substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

GEORGE F. (BONNER. Nitnesses:

H. 13. than, G. R. I-IAIGH.

